for (double x : VALUES) {
        assertBitEquals(prev, aa.getAndSet(i, x));
        prev = x;
      }
    }
  }

  /** getAndAdd returns previous value and adds given value */
  public void testGetAndAdd() {
    AtomicDoubleArray aa = new AtomicDoubleArray(SIZE);
    for (int i : new int[] {0, SIZE - 1}) {
      for (double x : VALUES) {
        for (double y : VALUES) {
          aa.set(i, x);